Grease-cup.



A. R. PRIBIL.

GREASE CUP.

APPLICATION FILED AUG.25. 1913.

Patented Aug. 17, 1915.

gwQGiw INVENTOR.

I (5 W I W TTORNEYS,

ccLuMnlA PLANOGRAPH COHWASHINGTON, n. c.

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ALEXIS n. rn BI or nnrnorr, MICHIGAN, .ASSIGNORTO GEORGE w- BOWEN, or

, AUBURN, NEW YORK. V V

GRnAsn-cur.

Specification or Letters Patent. j Patented Aug. 1 7, 1915.

Application filedAugust'25, 1913. Serial No. 786,420.

To all whom it-mag] concern Beit known that I, ALnxis R; PRIBIL, acitizen of the United States, and a resident of Detroit, in the countyof Wayne and State of Michigan, have invented a new anduseful'Greas'e-Cup, of which the following is aspecificatlon.

This inventlon relates to grease cups 1ncluding two main elementsconnected by screw threads, and has for its object a particularly simpleand efficient. cap for normally holding the main elements from relaivemovement, and for also excluding dust from the interior of the greasecup; and the invention consists in the novel-features of constructionhereinafter set forth and claimed. 1 j

In describing this invention reference is had to the accompanyingdrawings in which like characters designate corresponding parts in allthe views.

Figures 1 and 2 are, respectively, an elevation and avertical sectionalview of one form of this grease cup. Fig. 3 is a plan view of the baseofmy grease cup. Fig. 4-

is an inverted plan view of the piston and the cap. Fig. 5 is anenlarged cross-sectional View, parts being omitted, illustrating thelocking operation of the cap.

1 is the base element of my grease cup, the same including theinternallythreaded barrel portion 2 and a depending stem 3 for attachment to thepart to-be lubricated, the

stem having an outlet passage 4.

5 is the piston element which includes a head threading into the barrel2' and an axial stem 6 provided with a handle 7 at its upper end.

8 is the cap, which is in the form of an movable shoulder 10 opposed tothe shoulder 9 and engaging the outer face of said closed end, theseshoulders 9 and 10 being of less diameter thanvthe closed end of thecap.

The shoulder 10" is'held in position by the handle 7 which is secured tothe upper end of the stem 6 in any suitable manner, as by a pin 11. Theouter portion of the closed end of the cap 8 and the side wall of saldcap are resilient and free to yield or distort,

and said side wall incloses and substantially fits. the barrel portion2.

Inthe illustrated embodiment of my invention, the barrel portion 2isformed with a plurality of lengthwise peripheral grooves 12sp'acedequidistantly apart, andthe side wall of. the cap 8 is: formedwith a difierent number of inwardprojections or shoulders 13 forentering the grooves 12, the projec-, tions 13 being also spacedequidistantly,vso that but one is located'in a groove at a time whilethe others press on the periphery of the barrel portion 2 and slightlydistort and tension the resilient side wall of the cap 8 to hold oneofthe' said projectionsin the groove, (F *5) the grooves and projectionsbeing so shaped that the projections or shoulders readily ratchetinto-and out of the grooves. o

In the illustrated form of the invention, there are four equidistantlyspaced grooves 12 and three equidistantlyspaced projections 13 sothatone groove and oneprojection engage upon but slight turning of thepiston 5. I The projections 13 are preferably formed by pressingportions of the cap 8 inwardly. s

The cap'8 ispractically dust proof as said cap 8 and barrel portion .2are so proportioned that when one of the projections 13 is in one of thegrooves 12, the greater portion of the side wall of the cap is heldtightly against the periphery of the barrel portion 2, and remainingportions of the opposing surfaces ofsaid parts 2 and 8. are but slightlyseparated.

What I claim is:

1. A grease cup comprising two elements, one having an internallythreaded barrel and the other including ahead threading in the'barrelanda cap carried by the element including the head, said cap being fixedrelatively to the head and comprising a resilient continuous sidewalltelescoping on x the barrel, said cap and barrel having interlockingsurfaces, and additional surfaces cooperating for distorting the sidewall of the cap asa whole for holding the interlocking surfaces inengagement.

' 2. A grease cup comprising two elements, one having an internallythreaded barrel and the other including a head threading in the barrel,and a cap carried by the element including the head, and fixedrelatively to ous side wall inclosing and engaging the barrel, one ofsaid engaging parts having a lengthwise groove, and the other of said engaging parts having projections for entering the groove, the projectionsbeing spaced apart so that when one enters the groove another pressesagainst the opposing surface of the part formed withthe, groove anddistorts and tensions said side wall to hold said one of the projectionsin the groove, substantially as and for the purpose specified.

3. A grease cup comprising two elements, one having an internallythreaded barrel and the other including a head threading in the barrel,and a cap carried by the element including the head, and fixedrelatively to the head and comprising a resilient continuous side wallinclosing and engaging the barrel, one of said engaging parts having aplurality of lengthwise grooves spaced equidistantly apart, and theother of said engaging parts having a different number of equidistantprojections for entering the grooves, whereby when one projection entersa groove the remaining projections press against the opposing surface ofthe part formed with the grooves, and distort and tension said side wallto hold said oneof the projections in the groove, substantially as andfor the purpose set forth.

4:. A grease cup comprising a base having an internally threaded barrelportion, a piston member including a head and a stem, the head threadinginto the barrel, and an inverted cup-shaped cap having its closed endfixed to the stem and its side wall resilient and continuous andencircling the barrel portion of the base, said barrel portion and saidwall having interengaging means, a part of which are designed tointerfit, and another part to cooperate for distorting the side wall ofthe cap and holding whereby when one projection enters. a

groove the other projections press against the periphery of'the barrelportion and dis- Copies of this patent may be obtained for tort the cap,substantially as and for the purpose specified.

6. A grease cup comprising a base having an internally threaded barrelportion, a piston element including a head and a stem, the headthreading into the barrel portion, and a cup shaped cap having itsclosed end provided with a central opening through which the stemextends, the barrel portion of the cap inclosing and engaging theperiphery of the barrel portion of the base, the stem being formed witha fixed shoulder engaging the inner side of the closed end of thecaprand with a removable shoulder engaging the outer side of the closedend ofthe cap, said shoulders being of less diameter than said closedend, and a handle mounted on the stem above the removable shoulder,

substantially as and for the purpose set forth.

7. A grease cup comprising a base having an internally threaded barrelportion, a piston element including a head and a stem, the headthreading into the barrel portion,

a cup shaped cap having its closed end fixed to the stem, and the outerportion of the closed end and its side wall being resilient, the sidewall being continuous and encircling the barrel portion of the base,said barrel portion having a plurality of lengthwise peripheral groovesequidistantly spaced, and said side wall having a different number ofinternally equidistant projections whereby when one projection enters agroove the other projections press against the periphery of the barrelportion and distort the cap as a whole, substantially as and for thepurpose described.

8. A grease cup comprising a base having an internally threaded barrelportion and a plurality of lengthwise peripheral grooves spaced from oneanother, a head threading into the barrel portion, and an invertedcupshaped cap associated with the head and having a continuous resilientside wall encircling the barrel portion, said cap being provided with aplurality of internal proj ections dissimilarly spaced from the grooveson the barrel, substantially as described.

In testimony whereof, I have hereunto signed my name in the presence oftwo attestingwitnesses, at Detroit, in the county" of Vi' ayne, in theState of Michigan, this 15th day of August, 1913.

ALEXIS R. PRIBIL.

Witnesses:

Gnonsn F. STANDLEY, JULE B. STANDLEY.

five cents each, by addressing the Commissioner of Patents,

Washington, D. (3.

